Cigarette

ABSTRACT

A cigarette includes a tobacco rod, a support segment located at a downstream end of the tobacco rod, a cooling segment located at a downstream end of the support segment, and a mouthpiece located at a downstream end of the cooling segment. The cigarette further includes a corrugated inner wrapper configured to wrap the mouthpiece and an outer wrapper configured to wrap the corrugated inner wrapper.

TECHNICAL FIELD

One or more embodiments of the present disclosure provide a cigaretteincluding a tobacco rod and a filter rod.

BACKGROUND ART

Recently, the demand for alternative methods to overcome theshortcomings of general cigarettes has increased. For example, there isan increasing demand for a method of generating aerosol by heating anaerosol generating material in cigarettes, rather than by burningcigarettes.

A cigarette includes a filter, and the filter serves to filter certainingredients contained in an aerosol, or cool the aerosol. When filteringperformance of the filter is too high, the amount of aerosol transferdecreases, and when the filtering performance is too low, there is aproblem in that certain ingredients contained in the aerosol are notfiltered.

Therefore, research is being conducted on filters having appropriateperformance by changing components constituting the filter or changing astructure of the filter.

DESCRIPTION OF EMBODIMENTS Technical Problem

One or more embodiments of the present disclosure provide a cigaretteincluding a corrugated inner wrapper configured to wrap a mouthpiece,and an outer wrapper configured to wrap the corrugated inner wrapper. Apassage through which an aerosol passes is provided between thecorrugated inner wrapper and the outer wrapper. Additional aspects willbe set forth in part in the description which follows and, in part, willbe apparent from the description, or may be learned by the practice ofthe presented embodiments.

Solution to Problem

A cigarette includes a tobacco rod, a support segment located at adownstream end of the tobacco rod, a cooling segment located at adownstream end of the support segment, and a mouthpiece located at adownstream end of the cooling segment.

The cigarette may further include a corrugated inner wrapper configuredto wrap the mouthpiece, and an outer wrapper configured to wrap thecorrugated inner wrapper.

Advantageous Effects of Disclosure

According to one or more embodiments of the present disclosure, apassage is formed between a corrugated inner wrapper configured to wrapa mouthpiece, and an outer wrapper configured to wrap the corrugatedinner wrapper, and as an aerosol passes through the passage to bedelivered to a user, the amount of aerosol transfer may be increased.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a diagram illustrating an example in which a cigarette isinserted into a holder.

FIG. 2 shows a view showing an example of the cigarette.

FIG. 3 is a cross-sectional view of a cigarette including a corrugatedinner wrapper, according to an embodiment of the present disclosure.

FIG. 4 is a cross-sectional view of a mouthpiece including a corrugatedinner wrapper, according to an embodiment.

FIG. 5 is a cross-sectional view of a cigarette including a perforatedcooling segment, according to an embodiment.

FIG. 6 is a cross-sectional view of a cigarette including a corrugatedinner wrapper, according to another embodiment.

BEST MODE

According to an aspect of the present disclosure, a cigarette includes:a tobacco rod; a support segment located at a downstream end of thetobacco rod; a cooling segment located at a downstream end of thesupport segment; and a mouthpiece located at a downstream end of thecooling segment, wherein the cigarette may further include a corrugatedinner wrapper configured to wrap the mouthpiece, and an outer wrapperconfigured to wrap the corrugated inner wrapper.

According to another aspect of the present disclosure, a cigaretteincludes: a tobacco rod; a first support segment located at a downstreamend of the tobacco rod; a second support segment that is located at adownstream end of the first support segment, and has an inner diameterlarger than an inner diameter of the first support segment; and amouthpiece located at a downstream end of the second support segment,wherein the cigarette may further include a corrugated inner wrapperconfigured to wrap the mouthpiece, and an outer wrapper configured towrap the corrugated inner wrapper.

MODE OF DISCLOSURE

With respect to the terms used to describe the various embodiments,general terms which are currently and widely used are selected inconsideration of functions of structural elements in the variousembodiments of the present disclosure. However, meanings of the termscan be changed according to intention, a judicial precedence, theappearance of new technology, and the like. In addition, in certaincases, a term which is not commonly used can be selected. In such acase, the meaning of the term will be described in detail at thecorresponding portion in the description of the present disclosure.Therefore, the terms used in the various embodiments of the presentdisclosure should be defined based on the meanings of the terms and thedescriptions provided herein.

In addition, unless explicitly described to the contrary, the word“comprise” and variations such as “comprises” or “comprising” will beunderstood to imply the inclusion of stated elements but not theexclusion of any other elements. In addition, the terms “-er”, “-or”,and “module” described in the specification mean units for processing atleast one function and operation and can be implemented by hardwarecomponents or software components and combinations thereof.

In terms of terms “upstream” and “downstream” in the followingembodiments, the “upstream” refers to a portion where air flows into acigarette from the outside, and the “downstream” refers to a portionwhere air flows out of the cigarette when a user inhales air, using thecigarette. The terms “upstream” and “downstream” are used to indicaterelative positions between segments that constitute the cigarette. Whenusing the cigarette, the user may bite a downstream end of thecigarette. A term “end portion” may also be described as an “end”.

Hereinafter, the present disclosure will now be described more fullywith reference to the accompanying drawings, in which exemplaryembodiments of the present disclosure are shown such that one ofordinary skill in the art may easily work the present disclosure. Thedisclosure may, however, be embodied in many different forms and shouldnot be construed as being limited to the embodiments set forth herein.

Hereinafter, embodiments of the present disclosure will be described indetail with reference to the drawings.

FIG. 1 is a diagram illustrating an example in which a cigarette isinserted into a holder.

Referring to FIG. 1, a cigarette 2 may be inserted into a holder 1. Whenthe cigarette 2 is inserted into the holder 1, a heater 130 is locatedin the cigarette 2. Thus, an aerosol generating material of thecigarette 2 is heated by the heated heater 130, and an aerosol isgenerated, accordingly.

The cigarette 2 may have a shape similar to a common combustion-typecigarette. For example, the cigarette 2 may be divided into a firstportion 140 configured to include the aerosol generating material, and asecond portion 150 configured to include a filter and the like.

The first portion 140 may be completely inserted into the holder 1, andthe second portion 150 may be exposed to the outside. Alternatively,only a part of the first portion 140 may be inserted into the holder 1,or a part of the first portion 140 and of the second portion 150 may beinserted into the holder 1.

A user may inhale the aerosol while biting the second portion 150. Inthat case, the aerosol is generated when air from the outside passesthrough the first portion 140, and the generated aerosol passes throughthe second portion 150 and is delivered to the user's mouth.

Air may flow in from the outside through at least one air passage formedin the holder 1. Alternatively, air may flow in from the outside throughat least one hole formed on a surface of the cigarette 2.

FIG. 2 is a configuration diagram illustrating an example of acigarette.

Referring to FIG. 2, the cigarette 2 includes a tobacco rod 210, a firstfilter segment 221, a cooling structure 222, and a second filter segment223. The first portion described above with reference to FIG. 1 includesthe tobacco rod 210, and the second portion described above withreference to FIG. 1 includes the first filter segment 221, the coolingstructure 222, and the second filter segment 223.

Referring to FIG. 2, the cigarette 2 may be packaged by wrappers 231,232, 233, 234, 235, and 236. For example, the tobacco rod 210 ispackaged by the first wrapper 231, and the first filter segment 221 ispackaged by the second wrapper 232. The cooling structure 222 ispackaged by the third wrapper 233, and the second filter segment 223 ispackaged by the fourth wrapper 234.

The fifth wrapper 235 may wrap an outer periphery of the first wrapper231, of the second wrapper 232, and of the third wrapper 233. In otherwords, the tobacco rod 210, the first filter segment 221 and the coolingstructure 222 of the cigarette 2 may be further packaged by the fifthwrapper 235. In addition, the sixth wrapper 236 may wrap at least a partof the fifth wrapper 235 and an outer periphery of the fourth wrapper234. In other words, the sixth wrapper 236 may further package at leasta part of the cooling structure 222 and the second filter segment 223 ofthe cigarette 2.

The first wrapper 231, the second wrapper 232, the fifth wrapper 235,and the sixth wrapper 236 may be made of a common wrapper. For example,the first wrapper 231, the second wrapper 232, the fifth wrapper 235,and the sixth wrapper 236 may include a porous wrapper or a non-porouswrapper. For example, the first wrapper 231 may have a thickness ofabout 61 μm and a porosity of about 15 CU, and the second wrapper 232may have a thickness of about 63 μm and a porosity of about 15 CU.However, embodiments of the present disclosure are not limited thereto.In addition, the fifth wrapper 235 may have a thickness of about 66 μmand a porosity of about 10 CU, and the sixth wrapper 236 may have athickness of about 66 μm and a porosity of about 17 CU. However,embodiments of the present disclosure are not limited thereto.

In addition, an inner surface of the first wrapper 231 and/or of thesecond wrapper 232 may further include an aluminum foil.

The third wrapper 233 and the fourth wrapper 234 may be made of a hardwrapper. For example, the third wrapper 233 may have a thickness ofabout 158 μm and a porosity of about 33 CU, and the fourth wrapper 234may have a thickness of about 155 μm and a porosity of about 46 CU.However, embodiments of the present disclosure are not limited thereto.

A certain material may be added to the fifth wrapper 235 and the sixthwrapper 236. Here, silicon may be used as an example of the certainmaterial. However, embodiments of the present disclosure are not limitedthereto. For example, silicon has characteristics such as heatresistance with little change with temperature, oxidation resistance,resistance to various chemicals, water repellency to water, orelectrical insulation. However, even if it is not silicon, any materialhaving the above-described characteristics may be applied (or coated) tothe fifth wrapper 235 and the sixth wrapper 236 without limitation.

The fifth wrapper 235 and the sixth wrapper 236 may prevent thecigarette 2 from being burned. For example, when the tobacco rod 210 isheated by the heater 130, there is a possibility in that the cigarette 2is burned. More specifically, when temperature rises above the ignitionpoint of any one of substances included in the tobacco rod 210, thecigarette 2 may be burned. Even in that case, since the fifth wrapper235 and the sixth wrapper 236 contain a non-combustible material, thecigarette 2 may be prevented from being burned.

In addition, the fifth wrapper 235 may prevent the holder 1 from beingcontaminated by materials generated from the cigarette 2. Liquids may begenerated from the cigarette 2 by a user's puffing. For example, as anaerosol generated from the cigarette 2 is cooled by air from theoutside, the liquids (e.g., moisture, etc.) may be generated. As thefifth wrapper 235 packages the tobacco rod 210 and/or the first filtersegment 221, the liquids generated from the cigarette 2 may be preventedfrom leaking out of the cigarette 2. Accordingly, the inside of theholder 1 may be prevented from being contaminated by the liquidsgenerated from the cigarette 2.

A diameter of the cigarette 2 may be within a range of 5 mm to 9 mm, anda length of the cigarette 2 may be about 48 mm. However, embodiments ofthe present disclosure are not limited thereto. For example, a length ofthe tobacco rod 210 may be about 12 mm, a length of the first filtersegment 221 may be about 10 mm, a length of the cooling structure 222may be about 14 mm, and a length of the second filter segment 223 may beabout 12 mm. However, embodiments of the present disclosure are notlimited thereto.

The structure of the cigarette 2 illustrated in FIG. 2 is merely anexample, and some components thereof may be omitted. For example, thecigarette 2 may not include one or more of the first filter segment 221,the cooling structure 222, and the second filter segment 223.

The tobacco rod 210 includes an aerosol generating material. Forexample, the aerosol generating material may include at least one ofglycerin, propylene glycol, ethylene glycol, dipropylene glycol,diethylene glycol, triethylene glycol, tetraethylene glycol, and oleylalcohol.

In addition, the tobacco rod 210 may contain other additives such asflavoring agents, wetting agents and/or organic acids. Examples of theflavoring agents may include licorice, sucrose, fructose syrup,isosweet, cocoa, lavender, cinnamon, cardamom, celery, fenugreek,cascarilla, sandalwood, bergamot, geranium, honey essence, rose oil,Vanilla, lemon oil, orange oil, mint oil, cinnamon, caraway, cognac,jasmine, chamomile, menthol, cinnamon, ylang-ylang, sage, spearmint,ginger, coriander, coffee, or the like. In addition, examples of thewetting agents may include glycerin, propylene glycol, or the like.

As an example, the tobacco rod 210 may be filled with a reconstitutedtobacco sheet.

As another example, the tobacco rod 210 may be filled with pipe tobacco.Here, the pipe tobacco may be produced by finely cutting thereconstituted tobacco sheet.

As another example, a tobacco rod 310 may be filled with a plurality oftobacco strands shredded from the reconstituted tobacco sheet. Forexample, the tobacco rod 310 may be formed by combining the plurality oftobacco strands in the same direction (parallel) or randomly.

For example, the reconstituted tobacco sheet may be manufactured by thefollowing process. First, a tobacco raw material is ground to produceslurry in which the aerosol generating material (e.g., glycerin,propylene glycol, etc.), a flavoring liquid, a binder (e.g., guar gum,xanthan gum, carboxymethyl cellulose (CMC), etc.), water, and the likeare mixed, and the slurry is used to form the reconstituted tobaccosheet. When making the slurry, natural pulp or cellulose may be addedthereto, and one or more binders may be mixed to be used. The tobaccostrands may be produced by cutting or shredding a dried reconstitutedtobacco sheet.

The tobacco raw material may include tobacco leaf pieces, tobacco stems,and/or tobacco fines generated during tobacco processing. In addition,other additives such as wood cellulose fibers may be contained in thereconstituted tobacco sheet.

5% to 40% of the aerosol generating material may be added to the slurry,and 2% to 35% of the aerosol generating material may remain in thereconstituted tobacco sheet. It is desirable that 5% to 30% of theaerosol generating material remain in the reconstituted tobacco sheet.

In addition, before a process in which the tobacco rod 210 is packagedby the first wrapper 231, the flavoring liquid such as menthol, amoisturizer, or the like may be sprayed to a center of the tobacco rod210 to be added thereto.

The first filter segment 221 may include a cellulose acetate filter. Forexample, the first filter segment 221 may include a tube-shapedstructure including a hollow therein. The first filter segment 221 mayhave an appropriate length within a range of 4 mm to 30 mm. However,embodiments of the present disclosure are not limited thereto. It isdesirable that the length of the first filter segment 221 be 10 mm.However, embodiments of the present disclosure are not limited thereto.

The hollow included in the first filter segment 221 may have anappropriate diameter within a range of 2 mm to 4.5 mm. However,embodiments of the present disclosure are not limited thereto.

When the first filter segment 221 is manufactured, the content of aplasticizer may be regulated to adjust hardness of the first filtersegment 221.

In addition, the first filter segment 221 may be manufactured byinserting therein (e.g., hollow) a structure such as a film or a tubemade of the same or different material.

The first filter segment 221 may be made of cellulose acetate.Therefore, when the heater 130 is inserted, materials inside the tobaccorod 210 may be prevented from being pushed back, and an effect ofcooling an aerosol may be generated.

The cooling structure 222 cools the aerosol generated by the heater 130heating the tobacco rod 210. Therefore, the user may inhale the aerosolcooled to an appropriate temperature.

A length or diameter of the cooling structure 222 may be determined invarious ways according to a shape of the cigarette 2. For example, thelength of the cooling structure 222 may be appropriately employed fromwithin a range of 7 mm to 20 mm. It is desirable that the length of thecooling structure 222 be about 14 mm. However, embodiments of thepresent disclosure are not limited thereto.

The cooling structure 222 may be manufactured by weaving polymer fibers.In that case, the flavoring liquid may be applied to the fibers made ofpolymer. Alternatively, the cooling structure 222 may be manufactured byweaving separate fibers onto which the flavoring liquid is applied andthe fibers made of polymer together.

Alternatively, the cooling structure 222 may be formed by a crimpedpolymer sheet.

The polymer may be made of a material selected from the group consistingof polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC),polyethylene terephthalate (PET), polylactic acid (PLA), celluloseacetate (CA), and an aluminum foil.

As the cooling structure 222 is formed by the woven polymer fibers orthe crimped polymer sheet, the cooling structure 222 may include asingle or a plurality of channels extending in a longitudinal direction.Here, a channel refers to a passage through which gas (for example, airor an aerosol) passes.

For example, the cooling structure 222 made of the crimped polymer sheetmay be formed from a material having a thickness between about 5 μm andabout 300 μm, for example, between about 10 μm and about 250 μm. Inaddition, a total surface area of the cooling structure 222 may bebetween about 300 mm²/mm and about 1000 mm²/mm. In addition, an aerosolcooling element may be formed from a material having a specific surfacearea of between about 10 mm²/mg and about 100 mm²/mg.

The cooling structure 222 may include a thread containing a volatileflavor substance. Here, the volatile flavor substance may includementhol. However, embodiments of the present disclosure are not limitedthereto. For example, the thread may be filled with an adequate amountof menthol to provide the cooling structure 222 with 1.5 mg or more ofmenthol.

The second filter segment 223 may include a cellulose acetate filter. Alength of the second filter segment 223 may be appropriately employedfrom within a range of 4 mm to 20 mm. For example, the length of thesecond filter segment 223 may be about 12 mm. However, embodiments ofthe present disclosure are not limited thereto.

The second filter segment 223 may be manufactured by spraying theflavoring liquid thereon such that the second filter segment 223generates a flavor. Alternatively, the separate fibers onto which theflavoring liquid is applied may be inserted into the second filtersegment 223. The aerosol generated from the tobacco rod 210 is cooledwhen passing through the cooling structure 222, and the cooled aerosolis delivered to the user through the second filter segment 223. Thus,when a flavor element is added to the second filter segment 223, theflavor delivered to the user may last longer than before.

FIG. 3 is a cross-sectional view of a cigarette including a corrugatedinner wrapper, according to an embodiment.

Referring to FIG. 3, a cigarette 300 may include the tobacco rod 310, asupport segment 320, a cooling segment 330, and a mouthpiece 340.However, that is merely an example, and the cigarette 300 may furtherinclude other components in addition to the components 310 to 340illustrated in FIG. 3, or some of the components 310 to 340 illustratedin FIG. 3 may be omitted.

According to an embodiment, the support segment 320 may be located at adownstream end of the tobacco rod 310, the cooling segment 330 may belocated at a downstream end of the support segment 320, and themouthpiece 340 may be located at a downstream end of the cooling segment330. However, an arrangement structure of a plurality of segmentsconstituting the cigarette 300 is not limited thereto.

The tobacco rod 310 may be made of a sheet, or a strand. In addition,the tobacco rod 310 may be made of pipe tobacco finely cut from atobacco sheet. The tobacco rod 310 may have a cylindrical shape, andsmoke and/or an aerosol may be generated as the tobacco rod 310 isheated.

The tobacco rod 310 may include additives such as aerosol generatingmaterials, flavoring agents, wetting agents and/or organic acids, orflavoring liquids such as menthol or moisturizing agents. However,embodiments of the present disclosure are not limited thereto.

The support segment 320 may include a cellulose acetate filter. Forexample, the support segment 320 may include a tube-shaped structureincluding a hollow therein. A length of the support segment 320 may beappropriately employed from within a range of 4 mm to 30 mm. However,embodiments of the present disclosure are not limited thereto. It isdesirable that the length of the support segment 320 be 10 mm. However,embodiments of the present disclosure are not limited thereto.

A diameter of the hollow included in the support segment 320 may beappropriately employed from within a range of 3 mm to 4.5 mm. However,embodiments of the present disclosure are not limited thereto. Hardnessof the support segment 320 may be adjusted by regulating the content ofa plasticizer when the support segment 320 is manufactured.

In order to prevent a size of the support segment 320 from decreasingover time, an outer periphery of the support segment 320 may bemanufactured to be packaged by a wrapper. Accordingly, it is possible toeasily couple the support segment 320 to other components.

In addition, the support segment 320 may be manufactured by insertingtherein (e.g., hollow) a structure such as a film, a tube, or the likemade of the same or different material.

The cooling segment 330 cools the aerosol generated as a heater heatsthe tobacco rod 310. Therefore, a user may inhale the aerosol cooled toan appropriate temperature when inhaling the cigarette 300.

A length or diameter of the cooling segment 330 may be determined invarious ways according to a shape of the cigarette 300. For example, thelength of the cooling segment 330 may be appropriately employed fromwithin a range of 7 mm to 30 mm. It is desirable that the length of thecooling segment 330 be 14 mm. However, embodiments of the presentdisclosure are not limited thereto.

The cooling segment 330 may be made of pure polylactic acid, or may bemade by combining polylactic acid with another degradable polymer. Forexample, the cooling segment 330 may be manufactured through anextrusion method or a fiber weaving method. The cooling segment 330 maybe manufactured in various shapes to increase a surface area per unitarea (i.e., a surface area in contact with the aerosol).

For example, the cooling segment 330 may be manufactured by weavingfibers made of polylactic acid. In that case, a flavoring liquid may beapplied to the fibers made of polylactic acid. Alternatively, thecooling segment 330 may be manufactured by using separate fibers ontowhich the flavoring liquid is applied and the fibers made of polylacticacid together.

The mouthpiece 340 may include a cellulose acetate filter. For example,the mouthpiece 340 may be made of a recess filter. However, embodimentsof the present disclosure are not limited thereto. A length of themouthpiece 340 may be appropriately employed from within a range of 4 mmto 30 mm. For example, the length of the mouthpiece 340 may be about 12mm. However, embodiments of the present disclosure are not limitedthereto.

The mouthpiece 340 may be manufactured by spraying the flavoring liquidthereon such that the mouthpiece 340 generates a flavor. Alternatively,the separate fibers onto which the flavoring liquid is applied may beinserted into the mouthpiece 340. As the tobacco rod 310 is heated, thegenerated aerosol passes through the cooling segment 330 and is cooled,and the cooled aerosol is delivered to the user through the mouthpiece340. Therefore, when a flavor element is added to the mouthpiece 340,the flavor delivered to the user may last longer than before. Inaddition, at least one capsule may be included in the mouthpiece 340.Here, the capsule may have a structure in which a liquid containing aspice is wrapped with a film. For example, the capsule may have aspherical or cylindrical shape.

According to an embodiment, each of the tobacco rod 310, the supportsegment 320, the cooling segment 330, and the mouthpiece 340 may bepackaged by a separate wrapper, respectively. In addition, the entirecigarette 300 may be double-packaged by another wrapper surrounding anouter periphery of the wrappers that package each of the tobacco rod310, the support segment 320, the cooling segment 330 and the mouthpiece340, respectively. However, the manner in which the cigarette 300 andthe components constituting the cigarette 300 are packaged by wrappersis not limited thereto.

Referring to FIG. 3, the mouthpiece 340 may be double-packaged. Morespecifically, a cellulose acetate 341 of the mouthpiece 340 may bepackaged by a corrugated inner wrapper 342, and the corrugated innerwrapper 342 may be packaged by an outer wrapper 343.

Due to corrugations of the corrugated inner wrapper 342, a passage 344through which the aerosol passes may be formed between the corrugatedinner wrapper 342 and the outer wrapper 343 configured to wrap thecorrugated inner wrapper 342. That is, the passage 344 through which theaerosol passes may be formed around a circumferential surface of themouthpiece 340 by the corrugated inner wrapper 342.

The aerosol that has been generated as the tobacco rod 310 is heatedpasses through the plurality of segments (e.g., the support segment 320,the cooling segment 330, and mouthpiece 340) in sequence, and isdelivered to the user. When the user inhales the cigarette 300, anadequate amount of aerosol may not be delivered to the user, due toresistance-to-draw (RTD) from the plurality of segments constituting thecigarette 300. According to one or more embodiments of the presentdisclosure, the passage 344 is formed between the corrugated innerwrapper 342 configured to wrap the cellulose acetate 341 of themouthpiece 340, and the outer wrapper 343 configured to wrap thecorrugated inner wrapper 342, and the aerosol passes through the passage344 to be delivered to the user, thus increasing the amount of aerosoltransfer.

According to an embodiment, a width between the corrugations of thecorrugated inner wrapper 342 may be 0.1 mm to 5 mm, and a depth of thecorrugations may be 0.1 mm to 5 mm. It is desirable that the widthbetween the corrugations of the corrugated inner wrapper 342 be 1 mm to3 mm, and the depth of the corrugations be 0.3 mm to 1 mm.

In addition, the corrugations of the corrugated inner wrapper 342 may beformed by a stamping roller. The width between the corrugations of thecorrugated inner wrapper 342 and the depth of the corrugations of thecorrugated inner wrapper 342 may vary according to a width betweenuneven portions of the stamping roller, a depth of the uneven portionsof the stamping roller, and stamping intensity of the stamping roller.

The outer wrapper 343 may wrap only the mouthpiece 340, or may wrap atleast another segment (for example, the cooling segment 330) thatconstitutes the cigarette 300 and the mouthpiece 340 at the same time tocouple mouthpiece 340 to other segments.

FIG. 4 is a cross-sectional view of a mouthpiece including a corrugatedinner wrapper, according to an embodiment.

Referring FIG. 4, a mouthpiece 400 may include a cellulose acetate 410,a corrugated inner wrapper 420, and an outer wrapper 430. As illustratedin FIG. 4, the corrugated inner wrapper 420 may package the celluloseacetate 410 in a form surrounding an outer periphery of the celluloseacetate 410. In addition, since the corrugated inner wrapper 420 ispackaged by the outer wrapper 430, the mouthpiece 400 may bedouble-packaged.

Due to corrugations of the corrugated inner wrapper 420, a passagethrough which an aerosol passes may be formed between the corrugatedinner wrapper 420 and the outer wrapper 430 configured to wrap thecorrugated inner wrapper 420. In other words, the passage through whichthe aerosol passes may be formed around a circumferential surface of themouthpiece 400 by the corrugated inner wrapper 420.

The aerosol that has been generated as an aerosol generating material isheated passes not only a passage inside the cellulose acetate 410, butalso the passage formed between the corrugated inner wrapper 420 and theouter wrapper 430 to be delivered to a user, thus increasing the amountof aerosol transfer.

The corrugations of the corrugated inner wrapper 420 may be formed by astamping roller, and a width 421 between the corrugations and a depth422 of the corrugations of the corrugated inner wrapper 420 may bedetermined according to a width between and a depth of the unevenportions of the stamping roller, stamping intensity, and the like.

According to an embodiment, the width 421 between the corrugations ofthe corrugated inner wrapper 420 may be 0.1 mm to 5 mm, and the depth422 of the corrugations of the corrugated inner wrapper 420 may be 0.1mm to 5 mm. It is desirable that the width 421 between the corrugationsof the corrugated inner wrapper 420 be 1 mm to 3 mm, and the depth 422of the corrugations of the corrugated inner wrapper 420 be 0.3 mm to 1mm.

A cross section of the corrugations of the corrugated inner wrapper 420is not limited to the example illustrated in FIG. 4. The cross sectionof the corrugations of the corrugated inner wrapper 420 may have apolygonal shape such as a triangle, a square, and a trapezoid, or asemicircular shape.

FIG. 5 is a cross-sectional view of a cigarette including a perforatedcooling segment, according to an embodiment.

Referring to FIG. 5, a cigarette 500 may include a tobacco rod 510, asupport segment 520, a cooling segment 530, and a mouthpiece 540.However, that is merely an example, and the cigarette 500 may furtherinclude other components in addition to the components 510 to 540illustrated in FIG. 5, or some of the components 510 to 540 illustratedin FIG. 5 may be omitted.

Hereinafter, for ease of description, descriptions overlapping with FIG.3 will be omitted.

A perforation 531 may be formed in at least a portion of the coolingsegment 530. According to an embodiment, the perforation 531 may beformed at a position separated by 5 mm to 25 mm from a downstream end ofthe cooling segment 530 toward an upstream. It is desirable that theperforation 531 be formed at a position separated by 15 mm to 20 mm fromthe downstream end of the cooling segment 530 toward the upstream. Theperforation 531 may include 4 to 10 holes, and for example, theperforation 531 may include 4, 6, or 8 holes. However, the position ofthe perforation 531 and the number of the holes constituting theperforation 531 are not limited thereto.

When a user inhales the cigarette 500, air may flow into the coolingsegment 530 from the outside through the perforation 531 to move towardthe mouthpiece 540. The air flowing in from the outside through theperforation 531 may join air flowing in from an end of the tobacco rod510.

Some of the air flowing in from the outside through the perforation 531may be delivered to the user through a passage formed inside a celluloseacetate of the mouthpiece 540, and other of the air flowing in from theoutside through the perforation 531 may be delivered to the user througha passage formed between a corrugated inner wrapper and an outer wrapperof the mouthpiece 540.

When the user inhales the cigarette 500, not only the air flowing infrom the end of the cigarette rod 510 but also the air flowing inthrough the perforation 531 of the cooling segment 530 is delivered tothe user, thus increasing the amount of aerosol transfer.

FIG. 6 is a cross-sectional view of a cigarette including a corrugatedinner wrapper, according to another embodiment.

Referring to FIG. 6, a cigarette 600 may include a tobacco rod 610, afirst support segment 620, a second support segment 630, and amouthpiece 640. However, that is merely an example, and the cigarette600 may further include other components in addition to the components610 to 640 illustrated in FIG. 6, or some of the components 610 to 640illustrated in FIG. 6 may be omitted.

Hereinafter, for ease of description, descriptions overlapping with FIG.3 will be omitted.

According to an embodiment, the first support segment 620 may be locatedat a downstream end of the tobacco rod 610, the second support segment630 may be located at a downstream end of the first support segment 620,and the mouthpiece 640 may be located at a downstream end of the secondsupport segment. However, an arrangement structure of a plurality ofsegments constituting the cigarette 600 is not limited thereto.

The first support segment 620 and the second support segment 630 mayinclude a tube-shaped structure including a hollow therein. An innerdiameter of the second support segment 630 may be larger than an innerdiameter of the first support segment 620. According to an embodiment, adiameter of the first support segment 620 may be 7 mm to 9 mm, and theinner diameter of the first support segment 620 may be about 2.0 mm toabout 4.5 mm. A diameter of the second support segment 630 may be 7 mmto 9 mm, and the inner diameter of the second support segment 630 may beabout 3.0 mm to about 5.5 mm, for example, the inner diameter of thesecond support segment 630 may be 4.0 mm.

The inner diameter of the second support segment 630 is larger than theinner diameter of the first support segment 620, so that air passingthrough a hollow of the first support segment 620 may flow into a hollowof the second support segment 630, and may be diffused. The air thatmoves from the hollow of the first support segment 620 toward the hollowof the second support segment 630 and is diffused may have an increasedcontact surface area and an increased contact time with air flowing infrom the outside through perforations 631 as the deflection in adownstream direction of the cigarette 600 decreases. Accordingly, aneffect of cooling may be increased.

The perforations 631 may be formed in at least a portion of the secondsupport segment 630. The hollow inside the second support segment 630may be surrounded by a wall made of cellulose acetate, and theperforations 631 may be formed on the wall made of cellulose acetate.

According to an embodiment, the perforations 631 may be formed at aposition separated by 5 mm to 25 mm from a downstream end of the secondsupport segment 630 toward an upstream. It is desirable that theperforations 631 be formed at a position separated by 15 mm to 20 mmfrom the downstream end of the second support segment 630 toward theupstream. In addition, the perforations 631 may include 4 to 10 holes,for example, the perforations 631 may include 4, 6, or 8 holes. However,the position of the perforations 631 and the number of the holesconstituting the perforations 631 are not limited thereto.

When a user inhales the cigarette 600, air may flow into the hollow ofthe second support segment 630 from the outside through the perforations631 to move toward the mouthpiece 640. The air flowing in from theoutside through the perforations 631 may join air flowing in from an endof the tobacco rod 610.

Some of the air flowing in from the outside through the perforations 631may be delivered to the user through a passage formed inside thecellulose acetate of the mouthpiece 640, and other of the air flowing infrom the outside through the perforations 631 may be delivered to theuser through a passage formed between a corrugated inner wrapper and anouter wrapper of the mouthpiece 640.

When the user inhales the cigarette 600, not only the air flowing infrom the end of the cigarette rod 610, but also the air flowing inthrough the perforations 631 of the second support segment 630 isdelivered to the user, thus increasing the amount of aerosol transfer.

Those of ordinary skill in the art related to the present embodimentsmay understand that various changes in form and details can be madetherein without departing from the scope of the characteristicsdescribed above. The disclosed methods should be considered in adescriptive sense only and not for purposes of limitation. The scope ofthe present disclosure is defined by the appended claims rather than bythe foregoing description, and all differences within the scope ofequivalents thereof should be construed as being included in the presentdisclosure.

1. A cigarette comprising: a tobacco rod; a support segment located at adownstream end of the tobacco rod; a cooling segment located at adownstream end of the support segment; and a mouthpiece located at adownstream end of the cooling segment, wherein the cigarette furthercomprises a corrugated inner wrapper configured to wrap the mouthpieceand an outer wrapper configured to wrap the corrugated inner wrapper. 2.The cigarette of claim 1, wherein a passage through which an aerosolpasses is formed between the corrugated inner wrapper and the outerwrapper.
 3. The cigarette of claim 1, wherein a width betweencorrugations of the corrugated inner wrapper is 1 mm to 3 mm, and adepth of the corrugations of the corrugated inner wrapper is 0.3 mm to 1mm.
 4. The cigarette of claim 1, wherein the corrugations of thecorrugated inner wrapper are formed by a stamping roller.
 5. Thecigarette of claim 1, wherein air flows into the cooling segment fromthe outside through perforations formed in at least a portion of thecooling segment.
 6. The cigarette of claim 1, wherein the outer wrapperwraps the cooling segment, and the perforations are formed through theouter wrapper and the cooling segment such that air flows into thecooling segment from the outside through the perforations.
 7. Acigarette comprising: a tobacco rod; a first support segment located ata downstream end of the tobacco rod; a second support segment that islocated at a downstream end of the first support segment and has aninner diameter larger than an inner diameter of the first supportsegment; and a mouthpiece located at a downstream end of the secondsupport segment, wherein the cigarette further comprises a corrugatedinner wrapper configured to wrap the mouthpiece and an outer wrapperconfigured to wrap the corrugated inner wrapper.
 8. The cigarette ofclaim 7, wherein air flows into the second support segment from theoutside through perforations formed in at least a portion of the secondsupport segment.
 9. The cigarette of claim 8, wherein the outer wrapperwraps the second support segment, and the perforations are formedthrough the outer wrapper and the second support segment such that airflows into the second support segment from the outside through theperforations.